Fix some seg fault with venet nic

FossilOrigin-Name: 8873064065f3e7e58db46f80bcc73b9373cd2862b877707de6036f0238d7b0a9

src/ac/conf.c

@@ -361,6 +361,9 @@ static int init_listen_addrs()
 	/* count the addresses */
 	int ctr = 0;
 	for (ifa = ifap; ifa != 0; ifa = ifa->ifa_next) {
+		if (!ifa->ifa_addr)
+			continue;
+
 		if (ifa->ifa_addr->sa_family == AF_INET && conf_ipv4)
 			ctr++;
 #ifdef WITH_IPV6
@@ -388,6 +391,8 @@ static int init_listen_addrs()
 				continue;
 			}
 		}
+		if (!ifa->ifa_addr)
+			continue;
 
 		if (ifa->ifa_addr->sa_family == AF_INET && conf_ipv4) {
 			sock_addrtostr(ifa->ifa_addr, str, 100,0);
@@ -492,6 +497,8 @@ int init_bcast_addrs()
 
 
 		sa = ifa->ifa_addr;
+		if (!sa)
+			continue;
 		if (sa->sa_family != AF_INET)
 			continue;
 

src/cw/sock_cmpaddr.c

@@ -47,6 +47,14 @@ int sock_cmpaddr(const struct sockaddr *addr1, const struct sockaddr *addr2,int
 	int p1,p2;
 	int slen;
 
+	if (!addr1){
+		return -1;
+	}
+
+	if (!addr2){
+		return -1;
+	}
+
 	if (addr1->sa_family != addr2->sa_family){
 		return addr1->sa_family - addr2->sa_family;
 	}